Tag: ESP32

Running out of GPIO pins on your ESP32? This guide shows you how to use the PCF8574 I2C GPIO expander to add up to 64 extra I/O pins via a two-wire bus, covering wiring, address config, LED control, button input, interrupts, and matrix keypads.

This guide explains three high-impact ESP32 GPIO pitfalls, including restricted pins, floating inputs, and unstable reset design, with practical ESP-IDF code and hardware rules you can apply immediately.

This post provides the pin name of ESP32 WROOM module and ESP32 DevKitC development board in high resolution and also provides the pdf file for download.

This post shows how to remove strikethrough on completed tasks in Obsidian.

This is a testing post

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